Jan. 28 (Bloomberg) — The following is a list of companies whose shares are having unusual price changes in the U.S. Stock symbols are in parentheses after company names and prices are as of 1 0:10 a.m. in New York.

Acorda Therapeutics Inc. (ACOR US) rose the most since October 2006, advancing $5.61, or 26 percent to $27.39. The biotechnology company said a study of Fampridine-SR, for which it is seeking a pproval as a multiple sclerosis therapy, found it didn’t appear to put patients at risk of developing cardiac arrhythmias.

Alberto-Culver Co. (ACV US) rose the most since October 2000, jumping $2.35, or 10 percent, to $25.87. The maker of Alberto VO5 and Tresemme shampoos said that, excluding some items it earned 3 2 cents a share in the fiscal first quarter. The average estimate from analysts in a Bloomberg survey was 25 cents.

Alliance Data Systems Corp. (ADS US) fell the most since its June 2001 initial public offering, losing $24.74, or 38 percent, to $40.86. The credit-card processor said Blackstone Group LP (BX U S) informed the company that it doesn’t expect to get takeover approval from the Office of the Comptroller of the Currency.

Ambac Financial Group Inc. (ABK US) fell 89 cents, or 7.7 percent, to $10.65. The world’s second-largest bond insurer updated the risk factors of investing in its securities, including the pote ntial for a downgrade if one of its reinsurers’ credit ratings are cut. Ambac ceded $85.6 billion of its guarantees to reinsurance companies, or 14 percent of its outstanding contracts, the company said in a regulatory filing.

Bigger rival MBIA Inc. (MBI US) lost 8.9 percent to $12.93.

Black & Decker Corp. (BDK US) fell $2.66, or 3.8 percent, to $67.32, the lowest since Jan. 18. The largest U.S. power-tool maker predicted first-quarter profit of as little as $1.10 a share, sa ying “we recognize that the U.S. economy is slowing” in a statement. Analysts expected $1.46, the average estimate in a Bloomberg survey.

Landry’s Restaurants Inc. (LNY US) rose the most since its August 1993 initial public offering, jumping $4.45, or 27 percent to $21.12. The owner of the Chart House and Rainforest Cafe chains s aid Chief Executive Officer Tilman J. Fertitta has offered to buy out other shareholders in a transaction worth $1.3 billion including debt.

Matria Healthcare Inc. (MATR US) rose $1.85, or 6 percent, to $32.54, the highest since April 2006. Inverness Medical Innovations Inc. (IMA US), the maker of Clearblue pregnancy tests, said it will buy Matria for $39 a share in a deal valued at $900 million. Inverness fell 8.3 percent to $47.88.

McDonald’s Corp. (MCD US) retreated the most in the Dow Jones Industrial Average, losing $3.78, or 7 percent, to $50.32. The world’s largest restaurant company said sales at U.S. restaurants op en at least 13 months were unchanged in December, compared with the median estimate of a 2.8 percent gain from four analysts surveyed by Bloomberg News.

Wendy’s International Inc. (WEN US), U.S. hamburger chain that put itself up for sale last year, slipped 6.5 percent to $23.62. Turmoil in the financial markets has delayed the sale process, We ndy’s Chairman James Pickett said.

MercadoLibre Inc. (MELI US) fell the most since Jan. 17, losing $8.06, or 15 percent, to $46. The Latin American online- auction site partly owned by EBay Inc. said it intends to sell as much a s $292 million of shares. The creation of new stock tends to dilute earnings for existing shareholders.

New York Times Co. (NYT US) added 53 cents, or 3.6 percent, to $15.19 for the biggest advance since Nov. 13. Shareholders Firebrand Partners and Harbinger Capital Partners requested a meeting w ith management and nominated new directors for the newspaper publisher’s board.

Nymex Holdings Inc. (NMX US) climbed the most since November 2006, adding $8.96, or 8.4 percent, to $116.12. CME Group Inc. (CME US), the world’s largest futures exchange, is in preliminary tal ks to acquire Nymex to expand into energy trading. Under terms of the deal, Nymex shareholders would get about $119.20 a share in cash and stock, the two companies said. CME rose 2.9 percent to $64 7.21.

Raven Industries Inc. (RAVN US) fell $2.29, or 7.1 percent, to $29.86, the lowest since May 16. The plastics and electronics maker was cut to “sell” from “neutral” by analyst Michael Cox at Piper Jaffray & Co.

Rohm & Haas Co. (ROH US) gained the most since Nov. 28, adding $1.78, or 3.6 percent, to $51.68. The world’s biggest producer of acrylic-paint ingredients said fourth-quarter profit rose 2.3 pe rcent to $180 million or 91 cents a share, topping analysts’ estimates, because of increasing demand for materials used to make electronics and salt to de-ice roads.

Systemax Inc. (SYX US) dropped $1.63, or 10 percent, to $13.96, the lowest since December 2006. The company, which sells computers and related equipment over the Web and through catalogs, said a subsidiary is under investigation by Florida officials over allegations it kept or delayed customer rebates.

Verizon Communications Inc. (VZ US) fell $1.19, or 3.2 percent, to $36.57, the lowest since March 16. The second-largest U.S. phone company said fourth-quarter sales rose 5.5 percent to $23.8 b illion, missing the $24 billion average estimate of analysts in a Bloomberg survey.

YRC Worldwide Inc. (YRCW US) fell $1.71, or 9.1 percent, to $17.15 for the biggest loss since Jan. 3. The biggest U.S. trucking company by sales reported a fourth-quarter loss of $736 million a s it wrote down the value of two acquisitions. Excluding the previously announced writedown and other charges and gains, YRC said it earned 1 cent a share, trailing the 53-cent average of 14 analys t estimates compiled by Bloomberg.

(Click here if you are unable to view this photo gallery on your mobile device) The Ruth Bancroft Garden in Walnut Creek celebrates the life of its founder Ruth Bancroft who died at 109 on November 26, 2017. The Ruth Bancroft Garden is a nonprofit public dry garden that was planted by Mrs. Ruth Bancroft in 1972 and was opened to the...